json: Improve auto-base64 encoding to not split UTF-8 chars.
json: Improve auto-base64 encoding to not split UTF-8 chars.

* src/gpgme-json.c (make_data_object): Switch to Base64 also for UTF-8
characters.

Signed-off-by: Werner Koch <13bd1fc5137f503b0a8355ad400e7a87ebb45b25@gnupg.org>

gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme